The Cryptic Studios Website busts out the tiny font to warn customers they have uncovered evidence of unauthorized access to user accounts on their network (thanks VG247). Here's a portion that covers what are likely the main concerns about this:

The unauthorized access included user account names, handles, and encrypted passwords for those accounts. Even though the passwords were encrypted, it is apparent that the intruder has been able to crack some portion of the passwords in this database. All accounts that we believe were present in the database have had the passwords reset, and customers registered to these accounts have been notified via e-mail of this incident.

While we have no evidence that any other information was taken by the intruder, it is possible that the intruder was able to access additional account information. If they did so, the first and last name, e-mail address, date of birth (if provided to Cryptic Studios), billing address, and the first six digits and the last four digits of credit cards registered on the site may have been accessed. We have no evidence at this time that any data other than the account name, handle, and encrypted password were accessed for any user.

If they did so, the first and last name, e-mail address, date of birth (if provided to Cryptic Studios), billing address, and the first six digits and the last four digits of credit cards registered on the site may have been accessed.

Oh, you mean like everything someone would need to steal your identity?